What action must a flight crew take if the MCD is closed with the seal intact?

When the main cabin door (MCD) is closed with the seal intact, the flight crew is required to wait for verification from a Customer Service Agent (CSA) before entering the aircraft. This protocol ensures that the crew can verify that it is safe to enter the aircraft and that all necessary safety checks have been completed from the ground.

This step is important because the intact seal indicates that the door is secured and has not been deactivated for entry, which could pose risks such as pressure differentials or other safety concerns. Therefore, relying on the CSA, who is typically responsible for ensuring that the aircraft is ready for boarding and that it is safe for the crew to enter, is a vital part of maintaining operational safety and adherence to standard procedures.